Latest deals
FAQs
Price Alerts

Cheap flights from Washington to Jeju-do from $626

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Jeju-do departing on 12/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Washington to Jeju-do

Cheap round-trip flights

Enter your travel dates to find the best prices.
Cathay Pacific Logo
11:45 am - 6:30 amSEA  Seattle/Tacoma Intl-CJU Jeju City
26h 45m1 stop Hong Kong Intl
Cathay Pacific Logo
7:30 am - 10:05 amCJU  Jeju City-SEA Seattle/Tacoma Intl
18h 35m1 stop Hong Kong Intl
$850Cathay Pacific
Wed, Sep 16 - Thu, Oct 15
Cathay Pacific Logo
12:25 pm - 6:30 amSEA  Seattle/Tacoma Intl-CJU Jeju City
26h 05m1 stop Hong Kong Intl
Cathay Pacific Logo
7:30 am - 10:05 amCJU  Jeju City-SEA Seattle/Tacoma Intl
18h 35m1 stop Hong Kong Intl
$852Cathay Pacific
Mon, Sep 14 - Wed, Oct 14
Cathay Pacific Logo
11:45 am - 6:30 amSEA  Seattle/Tacoma Intl-CJU Jeju City
26h 45m1 stop Hong Kong Intl
Cathay Pacific Logo
7:30 am - 10:05 amCJU  Jeju City-SEA Seattle/Tacoma Intl
18h 35m1 stop Hong Kong Intl
$856Cathay Pacific
Thu, Sep 17 - Wed, Oct 14
Cathay Pacific Logo
12:25 pm - 6:30 amSEA  Seattle/Tacoma Intl-CJU Jeju City
26h 05m1 stop Hong Kong Intl
Cathay Pacific Logo
7:30 am - 10:05 amCJU  Jeju City-SEA Seattle/Tacoma Intl
18h 35m1 stop Hong Kong Intl
$878Cathay Pacific
Mon, Sep 14 - Tue, Oct 13
Cathay Pacific Logo
12:25 pm - 6:30 amSEA  Seattle/Tacoma Intl-CJU Jeju City
26h 05m1 stop Hong Kong Intl
Cathay Pacific Logo
7:30 am - 10:05 amCJU  Jeju City-SEA Seattle/Tacoma Intl
18h 35m1 stop Hong Kong Intl
$908Cathay Pacific
Thu, Sep 10 - Wed, Sep 16
Cathay Pacific Logo
12:25 pm - 6:30 amSEA  Seattle/Tacoma Intl-CJU Jeju City
26h 05m1 stop Hong Kong Intl
Cathay Pacific Logo
7:30 am - 10:05 amCJU  Jeju City-SEA Seattle/Tacoma Intl
18h 35m1 stop Hong Kong Intl
$928Cathay Pacific
Mon, Sep 14 - Sat, Oct 17
Cathay Pacific Logo
11:45 am - 6:30 amSEA  Seattle/Tacoma Intl-CJU Jeju City
26h 45m1 stop Hong Kong Intl
Cathay Pacific Logo
7:30 am - 10:05 amCJU  Jeju City-SEA Seattle/Tacoma Intl
18h 35m1 stop Hong Kong Intl
$966Cathay Pacific
Sat, Sep 19 - Tue, Oct 13
Multiple Airlines Logo
7:05 am - 7:45 pmSEA  Seattle/Tacoma Intl-CJU Jeju City
44h 40m2 stops Oakland Incheon Intl
Multiple Airlines Logo
8:15 am - 3:15 pmCJU  Jeju City-SEA Seattle/Tacoma Intl
23h 00m1 stop Seoul Gimpo Intl
$1,003Multiple Airlines
Mon, Sep 14 - Tue, Oct 13
Multiple Airlines Logo
10:47 am - 6:55 pmSEA  Seattle/Tacoma Intl-CJU Jeju City
40h 08m2 stops San Francisco Incheon Intl
Multiple Airlines Logo
7:50 am - 3:15 pmCJU  Jeju City-SEA Seattle/Tacoma Intl
23h 25m1 stop Seoul Gimpo Intl
$1,004Multiple Airlines
Sat, Sep 19 - Thu, Oct 15
Cathay Pacific Logo
11:45 am - 6:30 amSEA  Seattle/Tacoma Intl-CJU Jeju City
26h 45m1 stop Hong Kong Intl
Cathay Pacific Logo
7:30 am - 10:05 amCJU  Jeju City-SEA Seattle/Tacoma Intl
18h 35m1 stop Hong Kong Intl
$1,016Cathay Pacific
Sat, Sep 19 - Sat, Oct 17

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Cathay Pacific flights from State of Washington to Jeju-do

Our best Cathay Pacific deals on State of Washington to Jeju-do flight tickets
Cathay Pacific
Sep 16
SEA11:45 amSeattle/Tacoma Intl
26h 45m
1 stop
CJU6:30 amJeju City
Oct 15
CJU7:30 amJeju City
18h 35m
1 stop
SEA10:05 amSeattle/Tacoma Intl
$850
Cathay Pacific
Sep 14
SEA12:25 pmSeattle/Tacoma Intl
26h 05m
1 stop
CJU6:30 amJeju City
Oct 14
CJU7:30 amJeju City
18h 35m
1 stop
SEA10:05 amSeattle/Tacoma Intl
$852
Cathay Pacific
Sep 17
SEA11:45 amSeattle/Tacoma Intl
26h 45m
1 stop
CJU6:30 amJeju City
Oct 14
CJU7:30 amJeju City
18h 35m
1 stop
SEA10:05 amSeattle/Tacoma Intl
$856

Asiana Airlines flights from State of Washington to Jeju-do

Our best Asiana Airlines deals on State of Washington to Jeju-do flight tickets
Asiana Airlines
Sep 15
SEA12:10 amSeattle/Tacoma Intl
22h 00m
1 stop
CJU2:10 pmJeju City
Oct 16
CJU1:40 pmJeju City
17h 35m
1 stop
SEA3:15 pmSeattle/Tacoma Intl
$1,283
Asiana Airlines
Sep 17
SEA12:10 amSeattle/Tacoma Intl
24h 15m
1 stop
CJU4:25 pmJeju City
Oct 15
CJU8:45 amJeju City
22h 30m
1 stop
SEA3:15 pmSeattle/Tacoma Intl
$1,305

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Jeju-do that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 14, 2026.
Use the filters below to find and compare flights from Washington to Jeju-do that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleJeju City

SEA Seattle/Tacoma Intl - CJU Jeju City

SEACJU

Seattle/Tacoma Intl

Wed 9/16

11:45 am-6:30 am

1 stop26h 45m

Jeju City

Thu 10/15

7:30 am-10:05 am

1 stop18h 35m

$850
Quickest round-trip

SeattleJeju City

SEA Seattle/Tacoma Intl - CJU Jeju City

SEACJU

Seattle/Tacoma Intl

Mon 9/14

12:25 pm-6:30 am

1 stop26h 05m

Jeju City

Wed 10/14

7:30 am-10:05 am

1 stop18h 35m

$852

SeattleJeju City

SEA Seattle/Tacoma Intl - CJU Jeju City

SEACJU

Seattle/Tacoma Intl

Thu 9/17

11:45 am-6:30 am

1 stop26h 45m

Jeju City

Wed 10/14

7:30 am-10:05 am

1 stop18h 35m

$856

SeattleJeju City

SEA Seattle/Tacoma Intl - CJU Jeju City

SEACJU

Seattle/Tacoma Intl

Mon 9/14

12:25 pm-6:30 am

1 stop26h 05m

Jeju City

Tue 10/13

7:30 am-10:05 am

1 stop18h 35m

$878

SeattleJeju City

SEA Seattle/Tacoma Intl - CJU Jeju City

SEACJU

Seattle/Tacoma Intl

Thu 9/10

12:25 pm-6:30 am

1 stop26h 05m

Jeju City

Wed 9/16

7:30 am-10:05 am

1 stop18h 35m

$908

SeattleJeju City

SEA Seattle/Tacoma Intl - CJU Jeju City

SEACJU

Seattle/Tacoma Intl

Mon 9/14

12:25 pm-6:30 am

1 stop26h 05m

Jeju City

Sat 10/17

7:30 am-10:05 am

1 stop18h 35m

$928

SeattleJeju City

SEA Seattle/Tacoma Intl - CJU Jeju City

SEACJU

Seattle/Tacoma Intl

Sat 9/19

11:45 am-6:30 am

1 stop26h 45m

Jeju City

Tue 10/13

7:30 am-10:05 am

1 stop18h 35m

$966

SeattleJeju City

SEA Seattle/Tacoma Intl - CJU Jeju City

SEACJU

Seattle/Tacoma Intl

Mon 9/14

7:05 am-7:45 pm

2 stops44h 40m

Jeju City

Tue 10/13

8:15 am-3:15 pm

1 stop23h 00m

$1,003

SeattleJeju City

SEA Seattle/Tacoma Intl - CJU Jeju City

SEACJU

Seattle/Tacoma Intl

Sat 9/19

10:47 am-6:55 pm

2 stops40h 08m

Jeju City

Thu 10/15

7:50 am-3:15 pm

1 stop23h 25m

$1,004

SeattleJeju City

SEA Seattle/Tacoma Intl - CJU Jeju City

SEACJU

Seattle/Tacoma Intl

Sat 9/19

11:45 am-6:30 am

1 stop26h 45m

Jeju City

Sat 10/17

7:30 am-10:05 am

1 stop18h 35m

$1,016

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

Cheap State of Washington to Jeju-do flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Jeju-do

Fastest flight time

20h 05m

Direct flights

None
The fastest flight from State of Washington to Jeju-do takes 20h 05m
There are no direct flights from State of Washington to Jeju-do. There are no popular flight routes from State of Washington to Jeju-do.
Search flight deals

Frequently asked questions about flying from Washington to Jeju-do

  • When did momondo last update prices for flights from Washington to Jeju-do?

    Prices for flights from Washington to Jeju-do are updated daily.

  • How old do you have to be to fly from Washington to Jeju-do?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Jeju-do.

  • What documentation or ID do you need to fly to Jeju-do?

    The travel and health documents you'll need for your trip to Jeju-do may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Jeju-do. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from Washington to Jeju-do

  • How do I get Price Alerts for flights from State of Washington to Jeju-do?

    Price Alerts will notify you by email when the price for flights to Jeju-do from State of Washington decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from State of Washington to Jeju-do with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Jeju-do?

It is quick and easy to find Washington to Jeju-do flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Jeju-do that suits you.

Can I find flights from Washington to Jeju-do with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Washington to Jeju-do flights to just show those with flexible booking policies.

How can momondo help me find flights from Washington to Jeju-do?

Once all potential Washington to Jeju-do flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Washington to Jeju-do right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Jeju-do, momondo offers a useful price alert feature which will track prices for flights to Jeju-do from Washington and alert you when they change.

An easier way to manage your Jeju-do trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sun 9/13
Sun 9/20
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Jeju-do

Popular cities in Jeju-do

Popular flights according to clicks in the last 7 days on momondo
Flights to Seoulfrom $616
Flights to Jeju Cityfrom $823
Flights to Busanfrom $850
Flights to Daegufrom $831
Flights to Gwangjufrom $962
Flights to Yeosu
Flights to Jinjufrom $1,461
Flights to Ulsanfrom $1,567
Flights to Muan